Abrading tool



Feb- 6, 1940- F. w. sTAcHl-:LRODT '2,189,302

ABRADING TOOL Filed June 8, 1959 strung along opposite faces of the member. The Ol"l the Support Sides and having its end DOrtiOnS '15 i Patemedifeb. o, 1940 Y i I 2 189 i p l Q a oui-Tso- .STATES rATfEi orties Western Electric Company, Incorporated, New `York, N. Y., a corporation of New York Application .rune s, 1939, seriali No. 278,034

5 claims.` (o1. 51-181) This invention relates to abrading tools` and posite or rear ,end being used asa handle to be more particularly to abrasive strip holders. grasped by the user- The fOrWaI'd end iS tapered Anf object of this invention is the provision of to more readily permit its use where space is limi an, abrasive Srl-1p homer having Simple and pracited and` to'increase the visibility of the userA in l5L` ticalt means for supporting and clamping an applying it. Intermediate the ends of the supabrasive strip and for readily'releasing and per- DOrt bar i0V the tWO Sides thereof, Which are mitting movement'of the strip on theholder to tapered, are formed With aligned inclined D01"` position another portion thereof for use. tions or cam faces l2 whichextend inwardly from In accordance with theabove object, the presthe Diane ,0f the sides toward the fOIWaId end 19 ont invention, in' one embodiment thereof', pro-` face of the bar for a suitable'distance and' thence l0 vides an abrasive strip holder for use in hand OiitWardly'tG the plane 0f the Sides thereof. polishing operations and the like, comprising a Over the forward end face' of the support bar s support member over a forward end face ofwhich l0 is folded an emery 0r abrasive ribbon 0r Strip is foldedv anI abrasive strip having its end portions i3 having a Width Substantially the saine as that Support faces are formed intermediate their ends I4 strung alone the tWO Sides Of the SilDDOrt Whih with inwardly inclined portions extending toward are tapered at their forward ends. Although in the forward end'rface'of the support member. The the drawing the ahrasiVe strip 3-is shOWn as eX- .n f strip ends are threaded between the member andy tending aliIJrOXimately to the rear or handle .end e0 a spring actijiated slidable clamping device comof the support bar Il), .it is tobe understood that :2Q prising a sleeve carried on the member intermeit may `extend fOr any distance Which iS fOilnd `diate itsv ends. The sleeve has inner inclined Suitable. r f faces' cooperating with the inclined portions of Slidable 1113011 the rear end POrtiOn 0f the sU-D- theniember for constantly drawing the strip taut Dort bar Hl is a spring actuated clamping device` and clamping the end` portions thereof tothe i5 The Clamping del/lee inelildes in the partiell- ,2,5 n

`support member. Uponthe abrasive strip belar embodiment illustrated a tapered sleeve havcoming worn,`it is released by a relative longituing a `U-shalDed member attached theretO, the diral movement between the clamping' device and member haviner Opposite arms i 5 eXtendii'lg along the support member against the action of the two sides of the bar l0, which are disposed 'at Spring` whereupon the strip may be freely drawn right angles to-the sides thereof which are tae $0 along ythe support member to reposition` it. pered at` their forward ends.` Suitable clearance Thereafter, upon releasing either the support is provided between adjacent surfaces of the arms member or the clamping device the spring again i IB and the sides of the bar to permit a free relaca'uses the stri-p to be drawn taut and clamped to tive sliding movement therefrom. Interoonnecting 35 the support member. n l the arms i6 is a web i1 which is suitably spaced' 35 Other objects and advantages of this invention from the rear end face of the bar IU. Entered' in will more fully appear from the following detailed an aperture in the handle end of the barylfis description, taken in conjunction with the aca compression Spring 20, the Spring being 60mcompanying drawing, in which l pressed between the inner surface of the web I`1 40 l is a perspective view of an abrasive strip` and the inner end wall of the aperture. Ascrew 40 holder embodying the features of the invention; 2l threaded into the web l1 with its'inner end er@ Figs. 2 and 3 are fragmentary longitudinal vertending into the aperture and" surroundedby the tical and plan sections, respectively, through the spring SerVes t0 maintain the spring in POSitiOIL' holder shown in Fig. 1, and At their forward endsthe arms t6 are tapered Fig. 4 isa vertical section taken on the line 4--4 and attached to these tapered portions by screws 45 of Fig. 2. 21R` are spaced arms 23 of a `U-shaped member Referring to the drawing, the numeral Ill indiforming a part of the tapered clamping sleeve l5. cates a support member which may be of any An interconnecting web 2li extends between the suitable material such as aluminum, hard rubarms 23 at one side of the bar and at theopber, or phenolic resin. In the embodiment of posite side thereof aplate 251s secured by brazing, 50

the invention shown, the support member is inA soldering, or otherwise to the spacedvedges of the form of a bar of hard fibre which is generally the tapered portions of the arms I6. The web` fiat and of square cross-section throughout its 24 and the plate 25 arev inclined at angles sublength and is tapered upon two sides at its forstantially similar to that of the op-posite aligned ward or working end, as indicated at Il, the opcam faces l2 of the bar l0 and are suitably spaced 55 vided on the clamping device or sleeve I5 for cooperation with the cam faces I2. Upon the clamping device I5 and the bar I 0 being permitted to move longitudinally relatively to each other by the action of the compression spring 20 the end portions I4 of the abrasive strip I3 are drawn taut along opposite sides of the bar and clamped thereto.

Upon the strip I3 becoming Worn in use it may readily be repositioned upon the bar I by first relatively longitudinally moving the bar I0 and the clamping device I against the action of the compression spring to release the end portions I4 of the strip which are clamped between the cooperating cam faces I2 and 26 of the bar I0 and the device I5, respectively. While thus released, one or the other of theend portions I4 of the strip I3 may be grasped and freely drawn along the support bar I0 to position 'l unworn portions of the strip along the forward side faces of the bar. Thereafter, upon releasing either the support bar I 0 or the clamping device I5 the compressed spring 20 will again cause the strip i3 to be drawn taut and clamped to the bar IU.

From the foregoing description, it will be apparent that an abrasive strip holder is provided having simple-and practical means whereby abrasive strip strung thereon may be clamped thereto and constantly held taut, and which may be readily released andmoved thereon to position another portion thereof for use Without removing parts of the holder or the use of tools. It will be understood that the embodiment herein described is merely illustrative of the invention and one application thereof, the invention being limited only by the scope of the appended claims.-

What is claimed is: y

1. An abrasive strip holder comprising a support member' for an abrasive strip folded over an end face thereof and having its end portions strung along opposite portions of the member, said portions of the member having inclined faces intermediate their ends, means slidable upon the support member and having inclined faces cooperating with the inclined faces of the support member for engaging the end portions of the strip, and means operatively associated with the slid'able means and support member normally effective to urge said inclined faces into cooperatingoperative relation to draw the strip taut and clam-p it to the support member.

2.*An abrasive strip holder comprising a suppor-t member for an abrasive strip folded over an end face thereof and having its end portions strung along opposite portions of the member, said opposite portions of the member having inclined faces intermediate their ends, a member slidable upon encircling the support member and vthe end portions of the strip and having inclined faces vcooperating with the inclined faces of the support memberv for engaging the end portions of the strip, and means operatively arranged betherefrom. Thus opposite cam faces 26 are protween the slidable means and support member normally effective to urge said inclined faces into cooperating operative relation to draw the strip taut and clamp it to the support member.

3. An abrasive strip holder comprising a bar for supporting an abrasive strip folded over an end face thereof and having its end portions extending along and abutting opposite generally flat sides of the bar, said sides of the bar intermediate their ends having aligned inclined faces, a member slidable upon the bar and having inclined Vfaces cooperating with the inclined faces ofthe bar for engaging the end portions of the strip, and means operatively arranged between.

the member and the bar normally effective to urge said inclined faces into cooperating operative relation to draw the strip taut and clamp it to the bar.

4. An abrasive strip holder comprising a bar having a pair of opposite faces generally flat throughout their length for supporting an abrasive strip folded over an end face thereof and having its end portions extending along said opposite faces of the bar, said faces having intermediate their ends inwardly inclined portions eX- tending toward said end face of the bar, a sleeve member slidable upon the bar and having inclined portions cooperatingfwith the inclined portions o-f the bar for engaging the end portions of the strip, an element secured to said sleeve member and extending freely along faces of the bar other than said flat faces and across and spaced from an opposite end face of the bar, and means arranged between said latter end face of the bar and an opposed face of said element normally effective to urge said inclined portions into cooperatingoperative relation to draw the strip taut and clamp it to the bar.

5. Anabrasive strip holder comprising a bar of generally square cross-section for supporting an abrasive strip folded over an end face thereof andl having its end portions extending along opposite sides of the bar, said sides of the bar having aligned inwardly inclined faces extending toward said end face of the bar, a sleeve member slidable upon, encircling the bar and the end portions of the strip and having opposite inclined faces cooperating with the inclined faces of the bar for clampingthe end portions of the strip therebetween, a U-shaped member having parallelportions and an interconnecting portion, said parallel portions secured to parallel portions of said sleeve and extending along side faces of the bar disposed at right angles to said before mentioned sides of the bar, said interconnecting portion extend-ing across and spaced from an end face of the bar, and a compression spring ar ranged between the end face of the bar and the interconnecting portion of the U-shaped member normally acting to urge said inclined faces into cooperating operative relation to draw the strip taut and clamp it to the bar.

FRED W. STACHELRODT. 

